Non-nullable filed '...' must contain a non-null value when exiting constructor

[Kook Jin Noh]

Hi,

I am going through the following tutorial:

https://help.syncfusion.com/wpf/datagrid/getting-started?cs-save-lang=1&cs-lang=csharp

and noticed that the constructor class OrderInfo{... public OrderInfo {...}} in 'Creating Data Model for sample application' produces the following comment:

Could you please help me what I need to do here?

Thanks.

[Madhavan Sathapillai]

Hi kook Jin Noh,

We are able to replicate the reported scenario on our end. To resolve these warnings, use nullable properties. Please check the code snippet below, and we have also attached a simple sample.

Kindly refer the following code snippets.

public class OrderInfo

{

    int? orderID;

    string? customerId;

    public int? OrderID

    {

        get { return orderID; }

        set { orderID = value; }

    }

    public string? CustomerID

    {

        get { return customerId; }

        set { customerId = value; }

    }

}

Regards,
Madhavan S

Attachment: WpfApp1_ffce5a61.zip

[Kari Maru]

If you allow fields to be nullable (e.g., during initialization), use the? However, this is not recommended for Geometry Dash as you need those values ​​to not be null.